<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
    <style>
      button.active {
        color: red;
      }
      .content {
        width: 200px;
        height: 200px;
        text-align: center;
        line-height: 200px;
        border: 1px solid #333;
      }
    </style>
  </head>
  <body>
    <div id="app">
      <button
        v-for="(title, index) in tabs.titles"
        @click="switchTab(index)"
        :class="{active: activeIndex===index}"
      >
        {{title}}
      </button>

      <div
        v-for="(content, index) in tabs.content"
        class="content"
        v-show="activeIndex===index"
      >
        {{content}}
      </div>
    </div>

    <script src="./vue.global.js"></script>
    <script>
      const { createApp } = Vue;
      const app = createApp({
        data() {
          return {
            activeIndex: 0,
            tabs: {
              titles: ["标题1", "标题2", "标题3","标题4"],
              content: ["内容1", "内容2", "内容3", "内容4"],
            },
          };
        },
        methods: {
          switchTab(index) {
            this.activeIndex = index;
          },
        },
      });
      app.mount("#app");
    </script>
  </body>
</html>
